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https://github.com/c64scene-ar/llvm-6502.git
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4a9f933751
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2786 91177308-0d34-0410-b5e6-96231b3b80d8
97 lines
3.8 KiB
C++
97 lines
3.8 KiB
C++
// $Id$ -*-c++-*-
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//***************************************************************************
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// File:
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// MachineInstrAnnot.h
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//
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// Purpose:
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// Annotations used to pass information between code generation phases.
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//
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// History:
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// 5/10/02 - Vikram Adve - Created
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//**************************************************************************/
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#ifndef MACHINE_INSTR_ANNOT_h
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#define MACHINE_INSTR_ANNOT_h
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#include "llvm/Annotation.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include <vector>
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class Value;
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class TmpInstruction;
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class CallInst;
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class CallArgInfo {
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private:
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// Flag values for different argument passing methods
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static const unsigned char IntArgReg = 0x1;
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static const unsigned char FPArgReg = 0x2;
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static const unsigned char StackSlot = 0x4;
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const Value* argVal; // this argument
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const Value* argValCopy; // second copy of arg. when multiple
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// copies must be passed in registers
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unsigned char passingMethod; // flags recording passing methods
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public:
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// Constructors
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CallArgInfo(const Value* _argVal)
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: argVal(_argVal), argValCopy(NULL), passingMethod(0x0) {}
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CallArgInfo(const CallArgInfo& obj)
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: argVal(obj.argVal), argValCopy(obj.argValCopy),
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passingMethod(obj.passingMethod) {}
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// Accessor methods
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const Value* getArgVal() { return argVal; }
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const Value* getArgCopy() { return argValCopy; }
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bool usesIntArgReg() { return (bool) passingMethod & IntArgReg; }
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bool usesFPArgReg() { return (bool) passingMethod & FPArgReg; }
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bool usesStackSlot() { return (bool) passingMethod & StackSlot; }
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// Modifier methods
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void replaceArgVal(const Value* newVal) { argVal = newVal; }
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void setUseIntArgReg() { passingMethod |= IntArgReg; }
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void setUseFPArgReg() { passingMethod |= FPArgReg; }
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void setUseStackSlot() { passingMethod |= StackSlot; }
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void setArgCopy(const Value* tmp) { argValCopy = tmp; }
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};
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class CallArgsDescriptor: public Annotation { // Annotation for a MachineInstr
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private:
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static AnnotationID AID; // AnnotationID for this class
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std::vector<CallArgInfo> argInfoVec; // Descriptor for each argument
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const CallInst* callInstr; // The call instruction == result value
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const Value* funcPtr; // Pointer for indirect calls
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TmpInstruction* retAddrReg; // Tmp value for return address reg.
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bool isVarArgs; // Is this a varargs call?
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bool noPrototype; // Is this a call with no prototype?
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public:
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CallArgsDescriptor(const CallInst* _callInstr, TmpInstruction* _retAddrReg,
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bool _isVarArgs, bool _noPrototype);
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// Accessor methods to retrieve information about the call
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// Note that operands are numbered 1..#CallArgs
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unsigned int getNumArgs() const { return argInfoVec.size(); }
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CallArgInfo& getArgInfo(unsigned int op) { assert(op < argInfoVec.size());
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return argInfoVec[op]; }
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const CallInst* getReturnValue() const { return callInstr; }
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const Value* getIndirectFuncPtr() const { return funcPtr; }
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TmpInstruction* getReturnAddrReg() const { return retAddrReg; }
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bool isVarArgsFunc() const { return isVarArgs; }
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bool hasNoPrototype() const { return noPrototype; }
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// Annotation mechanism to annotate a MachineInstr with the descriptor.
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// This is not demand-driven because annotations can only be created
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// at restricted points during code generation.
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static inline CallArgsDescriptor *get(const MachineInstr* MI) {
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return (CallArgsDescriptor *) MI->getAnnotation(AID);
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}
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};
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#endif MACHINE_INSTR_ANNOT_h
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